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  Observing Radio Pulsars in the Galactic Centre with the Square Kilometre Array

Eatough, R. P., Lazio, T. J. W., Casanellas, J., Chatterjee, S., Cordes, J. M., Demorest, P. B., et al. (2015). Observing Radio Pulsars in the Galactic Centre with the Square Kilometre Array. Proceedings of Science, AASKA14. Retrieved from http://arxiv.org/abs/1501.00281.

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 Urheber:
Eatough, R. P., Autor
Lazio, T. J. W., Autor
Casanellas, Jordi1, Autor           
Chatterjee, S., Autor
Cordes, J. M., Autor
Demorest, P. B., Autor
Kramer, M., Autor
Lee, K. J., Autor
Liu, K., Autor
Ransom, S. M., Autor
Wex, N., Autor
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Schlagwörter: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Astrophysics, Galaxy Astrophysics, astro-ph.GA, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Zusammenfassung: The discovery and timing of radio pulsars within the Galactic centre is a fundamental aspect of the SKA Science Case, responding to the topic of "Strong Field Tests of Gravity with Pulsars and Black Holes" (Kramer et al. 2004; Cordes et al. 2004). Pulsars have in many ways proven to be excellent tools for testing the General theory of Relativity and alternative gravity theories (see Wex (2014) for a recent review). Timing a pulsar in orbit around a companion, provides a unique way of probing the relativistic dynamics and spacetime of such a system. The strictest tests of gravity, in strong field conditions, are expected to come from a pulsar orbiting a black hole. In this sense, a pulsar in a close orbit ($P_{\rm orb}$ < 1 yr) around our nearest supermassive black hole candidate, Sagittarius A* - at a distance of ~8.3 kpc in the Galactic centre (Gillessen et al. 2009a) - would be the ideal tool. Given the size of the orbit and the relativistic effects associated with it, even a slowly spinning pulsar would allow the black hole spacetime to be explored in great detail (Liu et al. 2012). For example, measurement of the frame dragging caused by the rotation of the supermassive black hole, would allow a test of the "cosmic censorship conjecture." The "no-hair theorem" can be tested by measuring the quadrupole moment of the black hole. These are two of the prime examples for the fundamental studies of gravity one could do with a pulsar around Sagittarius A*. As will be shown here, SKA1-MID and ultimately the SKA will provide the opportunity to begin to find and time the pulsars in this extreme environment.

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 Datum: 2015-01-0120152015
 Publikationsstatus: Online veröffentlicht
 Seiten: 14 pages, 5 figures, to be published in: "Advancing Astrophysics with the Square Kilometre Array", Proceedings of Science, PoS(AASKA14)045
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: arXiv: 1501.00281
URI: http://arxiv.org/abs/1501.00281
 Art des Abschluß: -

Veranstaltung

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Titel: Advancing Astrophysics with the Square Kilometre Array
Veranstaltungsort: Giardini Naxos, Italy
Start-/Enddatum: 2014-06-08 - 2014-06-13

Entscheidung

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Titel: Proceedings of Science
  Andere : PoS
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: AASKA14 Artikelnummer: - Start- / Endseite: - Identifikator: ISSN: 1824-8039
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000018850_1